drm/i915: Store 9 bits of PCI Device ID for platforms with a LP PCH

Although we use 9 bits of Device ID for identifying PCH, only 8 bits are
stored in dev_priv->pch_id. This makes HAS_PCH_CNP_LP() and
HAS_PCH_SPT_LP() incorrect. Fix this by storing all the 9 bits for the
platforms with LP PCH.

v2: Drop PCH_LPT_LP change (Imre)

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Fixes: commit ec7e0bb35f8d ("drm/i915/cnp: Add PCI ID for Cannonpoint LP PCH")
Reported-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1497641774-29104-1-git-send-email-dhinakaran.pandiyan@intel.com

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 3c2af70..ee2325b 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -176,24 +176,26 @@ static void intel_detect_pch(struct drm_i915_private *dev_priv)
                        unsigned short id_ext = pch->device &
                                INTEL_PCH_DEVICE_ID_MASK_EXT;
 
-                       dev_priv->pch_id = id;
-
                        if (id == INTEL_PCH_IBX_DEVICE_ID_TYPE) {
+                               dev_priv->pch_id = id;
                                dev_priv->pch_type = PCH_IBX;
                                DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
                                WARN_ON(!IS_GEN5(dev_priv));
                        } else if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {
+                               dev_priv->pch_id = id;
                                dev_priv->pch_type = PCH_CPT;
                                DRM_DEBUG_KMS("Found CougarPoint PCH\n");
                                WARN_ON(!(IS_GEN6(dev_priv) ||
                                        IS_IVYBRIDGE(dev_priv)));
                        } else if (id == INTEL_PCH_PPT_DEVICE_ID_TYPE) {
                                /* PantherPoint is CPT compatible */
+                               dev_priv->pch_id = id;
                                dev_priv->pch_type = PCH_CPT;
                                DRM_DEBUG_KMS("Found PantherPoint PCH\n");
                                WARN_ON(!(IS_GEN6(dev_priv) ||
                                        IS_IVYBRIDGE(dev_priv)));
                        } else if (id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {
+                               dev_priv->pch_id = id;
                                dev_priv->pch_type = PCH_LPT;
                                DRM_DEBUG_KMS("Found LynxPoint PCH\n");
                                WARN_ON(!IS_HASWELL(dev_priv) &&
@@ -201,6 +203,7 @@ static void intel_detect_pch(struct drm_i915_private *dev_priv)
                                WARN_ON(IS_HSW_ULT(dev_priv) ||
                                        IS_BDW_ULT(dev_priv));
                        } else if (id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
+                               dev_priv->pch_id = id;
                                dev_priv->pch_type = PCH_LPT;
                                DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
                                WARN_ON(!IS_HASWELL(dev_priv) &&
@@ -208,26 +211,31 @@ static void intel_detect_pch(struct drm_i915_private *dev_priv)
                                WARN_ON(!IS_HSW_ULT(dev_priv) &&
                                        !IS_BDW_ULT(dev_priv));
                        } else if (id == INTEL_PCH_SPT_DEVICE_ID_TYPE) {
+                               dev_priv->pch_id = id;
                                dev_priv->pch_type = PCH_SPT;
                                DRM_DEBUG_KMS("Found SunrisePoint PCH\n");
                                WARN_ON(!IS_SKYLAKE(dev_priv) &&
                                        !IS_KABYLAKE(dev_priv));
                        } else if (id_ext == INTEL_PCH_SPT_LP_DEVICE_ID_TYPE) {
+                               dev_priv->pch_id = id_ext;
                                dev_priv->pch_type = PCH_SPT;
                                DRM_DEBUG_KMS("Found SunrisePoint LP PCH\n");
                                WARN_ON(!IS_SKYLAKE(dev_priv) &&
                                        !IS_KABYLAKE(dev_priv));
                        } else if (id == INTEL_PCH_KBP_DEVICE_ID_TYPE) {
+                               dev_priv->pch_id = id;
                                dev_priv->pch_type = PCH_KBP;
                                DRM_DEBUG_KMS("Found KabyPoint PCH\n");
                                WARN_ON(!IS_SKYLAKE(dev_priv) &&
                                        !IS_KABYLAKE(dev_priv));
                        } else if (id == INTEL_PCH_CNP_DEVICE_ID_TYPE) {
+                               dev_priv->pch_id = id;
                                dev_priv->pch_type = PCH_CNP;
                                DRM_DEBUG_KMS("Found CannonPoint PCH\n");
                                WARN_ON(!IS_CANNONLAKE(dev_priv) &&
                                        !IS_COFFEELAKE(dev_priv));
                        } else if (id_ext == INTEL_PCH_CNP_LP_DEVICE_ID_TYPE) {
+                               dev_priv->pch_id = id_ext;
                                dev_priv->pch_type = PCH_CNP;
                                DRM_DEBUG_KMS("Found CannonPoint LP PCH\n");
                                WARN_ON(!IS_CANNONLAKE(dev_priv) &&
@@ -239,6 +247,7 @@ static void intel_detect_pch(struct drm_i915_private *dev_priv)
                                            PCI_SUBVENDOR_ID_REDHAT_QUMRANET &&
                                    pch->subsystem_device ==
                                            PCI_SUBDEVICE_ID_QEMU)) {
+                               dev_priv->pch_id = id;
                                dev_priv->pch_type =
                                        intel_virt_detect_pch(dev_priv);
                        } else